SpaceX isn't opening space to everyone. They're are preparing for the select few to be able to escape once the earth is no longer sustainable due to their own efforts.

Actually given that the first colonists on Mars will live pretty miserable lives before dying early of radiation poisoning Musk and Co are trying to recruit other people to move there.

Musk, Thiel, Bezos etc. none of these guys have ever said they want to move there.